Getting to Know Stereo Miking Techniques
There are three commonly used stereo miking variants used in recording: AB, XY, and
MS. A stereo recording, put simply, is one that contains two channel signals.
AB and XY recordings both record left and right channel signals, but the middle signal is
the result of combining both channels.
MS recordings record a real middle signal, but the left and right channels need to be
decoded from the side signal, which is the sum of both left and right channel signals.